Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e6b46a807ad79a…

MALICIOUS

PDF

75.9 KB Created: 2021-03-18 14:33:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a62c572a0a625f0f4f07d655d841e9c2 SHA-1: e52255407db1687ba9b00e10bcd78776f1691bec SHA-256: 05e6b46a807ad79a02a827313dd706cf8adeaf2ef2cdc7d8ab16d73c06dc5f2e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with one pointing to 'jumiwimov.ru', which is flagged as a potential phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to IELTS practice tests. The presence of external URIs and the ML classification strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/award?keyword=ielts+general+reading+practice+test+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/kadeposamo/hihhjaM/free_happy_birthday_cake_topper_printable.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453337/normal_6002b581569c9.pdfIn PDF document text
    • http://losmopaka.site/free_printable_to_do_list_with_checkboxeszuv72.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/ic1idjb/happy_glass_game_free.pdfIn PDF document text
    • http://contact-git.top/diremefosezugipexep52prx.pdfIn PDF document text
    • http://brumbum2.xyz/accords_guitare_basse_dbutantebmf8.pdfIn PDF document text
    • https://cdn.sqhk.co/satofapo/hagfmgf/go_viral_definition_slang.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5fe9103c69c9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466153/normal_604a7be471782.pdfIn PDF document text
    • http://thedopemarketing.com/the_road_pinoy_movie_reviewi3jwx.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/wordly_wise_3000_book_8_answer_key_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_604679175887c.pdfIn PDF document text
    • https://cdn.sqhk.co/zixagiko/cYuhjYH/98375897368.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/naxejuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d0fd22f1-78bd-4368-960d-2a324028b2bb.filesusr.com/ugd/a4d998_bf77f0a7922344d1a14b9ae4777b38ad.pdf?index=trueIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_9a16d7f364db4ec189570cfc67abe6bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/75782185245.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/42323126382.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/serta_motion_perfect_3_split_king.pdfIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_9a430c9bf15f4463ab6ada39044a890a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajujiju/18981971137.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_e1857273552a4157880ee2d2173902ec.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 5532 bytes
SHA-256: 48302367b7ef901ea14957a7bae6820ba549b3ace32f2b2ec328189e953927cd
font_01_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 11336 bytes
SHA-256: 62370941c9e7bcf3a0ab9e6bf1f56782a1f1e469ea509d929120878bd90450ed

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